PMID- 6436218
OWN - NLM
STAT- MEDLINE
DCOM- 19841205
LR  - 20190511
IS  - 0021-8812 (Print)
IS  - 0021-8812 (Linking)
VI  - 59
IP  - 3
DP  - 1984 Sep
TI  - Phenotypic relationships among early life traits and lifetime ewe production 
      efficiency.
PG  - 607-19
AB  - In least-squares analyses of variance, 10 ewe lamb traits were used, singly and 
      in various combinations, to predict lifetime production efficiency. Ewes belonged 
      to eight crossbred groups and were raised on two management systems for either 4 
      or 5 yr of production. Lifetime production efficiency components were total feed 
      and ewe ownership cost, gross income and net revenue. A ewe lamb's type of birth, 
      actual and adjusted weaning weight (WWt and AWWt), postweaning weight (PWWt) and 
      first year gross income (FGROS) were significantly phenotypically related to one 
      or more components of lifetime production efficiency. While triplets were better 
      than either of the other two birth types, single-born ewes were better than 
      twin-born ewes for lifetime production efficiency. Any of the three ewe lamb 
      weights (AWWt, WWt or PWWt) appeared to be an accurate estimator of lifetime 
      production efficiency. The effect of first year productivity was largely a 
      part-whole relationship with lifetime production because the regression 
      coefficients of subsequent lifetime production efficiency (not including first 
      year production) on first year productivity were near zero. Postweaning average 
      daily gain, ewe age at first estrus and date of first lambing (at approximately 
      12 mo of age) did not have significant relationships with lifetime production 
      efficiency. When type of birth, date of birth, weaning weight and first year 
      gross income were analyzed simultaneously, weaning weight and FGROS had the 
      greatest effect on lifetime production efficiency. When AWWt and type of birth 
      were considered simultaneously, both had significant relationships with lifetime 
      production efficiency.
FAU - Saoud, N B
AU  - Saoud NB
FAU - Hohenboken, W D
AU  - Hohenboken WD
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PL  - United States
TA  - J Anim Sci
JT  - Journal of animal science
JID - 8003002
SB  - IM
MH  - Age Factors
MH  - Analysis of Variance
MH  - Animal Husbandry/*economics
MH  - Animals
MH  - Body Weight
MH  - Cost-Benefit Analysis
MH  - Estrus
MH  - Female
MH  - Litter Size
MH  - Phenotype
MH  - Pregnancy
MH  - Pregnancy, Animal
MH  - *Reproduction
MH  - Sheep/*genetics/physiology
MH  - Weaning
EDAT- 1984/09/01 00:00
MHDA- 1984/09/01 00:01
CRDT- 1984/09/01 00:00
PHST- 1984/09/01 00:00 [pubmed]
PHST- 1984/09/01 00:01 [medline]
PHST- 1984/09/01 00:00 [entrez]
AID - 10.2527/jas1984.593607x [doi]
PST - ppublish
SO  - J Anim Sci. 1984 Sep;59(3):607-19. doi: 10.2527/jas1984.593607x.